Retargeting is a term used in the context of online advertising to refer to the practice of showing ads to users who have previously visited or engaged with a website or app, in order to drive them back to the website or app, and to encourage them to take a desired action, such as making a purchase, filling out a form, or downloading an app. Retargeting typically involves the use of cookies, pixels, or other tracking technologies to identify users and to serve them with relevant and personalized ads. Retargeting can be an effective way for advertisers to reach and engage with their target audience, and to drive brand awareness and engagement. Retargeting can also be beneficial for publishers and platforms, as it can provide a way to monetize their ad inventory, and can help to optimize and grow their relationships with advertisers.